JP6658450B2 - Elevator equipment - Google Patents

Description

  The present invention relates to a device for detecting an abnormality in a device for detecting a position of a car of an elevator running in a hoistway, and particularly to a device for detecting a position of a car at upper and lower ends of a hoistway, for example, an ETS (terminal floor forced deceleration device) ) Relates to means for detecting an abnormality.

As a device for detecting the position of a car of an elevator running in a hoistway, there is a device in which a number of position sensors are arranged in a hoistway, and the car is provided with a cam for operating the position sensor. In this apparatus, the position of the car is detected by the cam turning on and off the position sensor each time the car passes the location of the position sensor.
However, with this device, the number of position sensors increases, and the number of wiring cables for the position sensors also increases.

In view of this, there has been considered a configuration in which a photoelectric sensor is provided in a car, and a shielding plate (plate) that blocks an optical axis of the photoelectric sensor is disposed in the hoistway (see Patent Document 1).
This apparatus will be described with reference to the drawings. FIG. 9 is a view showing the arrangement of plates in a hoistway, FIG. 10 is a view showing a main part of a car ceiling, FIG. 11 is a detailed explanatory view of the plates, and FIG. FIG. 13 is a flowchart showing the operation, and FIG.

In the drawing, reference numeral 1 denotes a hoistway on which the car 2 moves up and down, A1 to A6 denote A-phase plates arranged in the hoistway 1, similarly B1 to B6 denote B-phase plates, and Z1 to Z6 denote Z-phase plates.
Reference numeral 4 denotes a photoelectric sensor installed on the upper part of the car 2, which includes a photoelectric sensor 4a for A-phase plates A1 to A6, a photoelectric sensor 4b for B-phase plates B1 to B6, and a photoelectric sensor 4z for Z-phase plates Z1 to Z6. It has. 5 is a pair of guide rails for guiding the car 2 up and down.

  As shown in FIG. 11, a gap portion G is formed in the A-phase and B-phase plates, and upper and lower portions thereof are shield portions S which are plate bodies. The shielding part S blocks the optical axis of the photoelectric sensor 4, and the gap G allows the optical axis of the photoelectric sensor 4 to pass therethrough, and both are alternately arranged in the vertical direction, and the length of the shielding part S and the gap G is long. L are the same.

As shown in FIG. 9, three plates A1 having a gap G, two plates A2 having a gap G, and one plate A3 having a gap G are arranged in the upper part of the hoistway 1 in order from the top. Have been.
On the other hand, below the hoistway 1, a plate A4 having two gaps G, a plate A5 having three gaps G, and a plate A6 having four gaps G are arranged in order from the top. In this way, a plate having a larger number of gaps G is arranged closer to the upper and lower ends of the hoistway 1, and one gap G is provided in a lower plate than in an upper portion.

  The B-phase plates B1 to B6 are also configured and arranged in the same manner as the A-phase plates A1 to A6, but are arranged above the hoistway 1 by L / 2 below the A-phase plates A1 to A6. In the lower part of the hoistway 1, it is arranged higher than the A-phase plates A1 to A6 by 3L / 2.

The Z-phase plates Z1 to Z6 have no gaps and are longer than the corresponding A-phase and B-phase plates, the upper ends of which extend above the corresponding A-phase and B-phase plates, and the lower ends thereof correspond to the corresponding A-phase plates. , And extends below the B-phase plate.
The photoelectric sensor 4 generates a pulse signal when detecting the upper end or the lower end (edge) of the shielding portion S, and detects the car position using the pulse signal.

  The hoistway 1 is divided into a number of sections based on the upper and lower ends of the Z-phase plates Z1 to Z6.

  As shown in FIGS. 9 and 12, section 1 extends from the upper end of the plate Z1 to the upper end of the hoistway 1, section 2 extends from the upper end of the plate Z1 to the upper end of the plate Z2, and so on. Section 7 extends to the lower end of the road 1. A section 11 extends from the lower end of the plate Z1 to the upper end of the hoistway 1, a section 12 extends from the lower end of the plate Z1 to a lower end of the plate Z2, and so on. And

  These sections also indicate the traveling direction of the car 2. That is, when it is determined that the car 2 that has passed each Z-phase plate has reached the sections 1 to 6, the car 2 is rising, and the car 2 that has passed each Z-phase plate has reached the sections 12 to 17. When it is determined that the car 2 is descending.

  Here, assuming that the distance between the top and bottom of each Z-phase plate is D [m], the distance D satisfies Expression (1).

  Further, the length L [m] of the shielding portion S and the gap portion G is represented by Expression (2).

Next, the flowchart of FIG. 13 will be described.
First, when the photoelectric sensor 4 detects an edge of any of the A-phase, B-phase, and Z-phase plates and generates a pulse signal (A, B, or Z), the signal processing unit (not shown) outputs the pulse signal. Is received (step S1).

  Next, in step S2, the number P of pulse edges is increased or decreased based on the signals A and B from the photoelectric sensor 4. Note that the initial value of P is 0. In this step, it is examined whether the conditions 1-1 and 1-2 are satisfied.

In the expression of the condition 1-1 in FIG. 13, the upper row indicates that when the shield S is detected in any of the A-phase plates (rise of the signal A), the shield S is detected in the B-phase plate. It shows the state where it is.
Here, the detection of the shield S means a state where the optical axis of the photoelectric sensor 4 is shielded by the shield S of the plate. In the conditional expression, when the signals A, B, and Z are true, it means that the optical axis of the photoelectric sensor 4 is shielded by the shield S of each plate.
The lower row shows a state in which, when detection of the shield S is completed in any one of the A-phase plates (falling of the signal A), the shield S is not detected in the B-phase plate. If either of these two conditions is satisfied, the pulse edge number P is increased to P + 1.

In the expression of the condition 1-2 in FIG. 13, the upper row indicates that the shielding portion S is detected in any of the A-phase plates (rising edge of the signal A), and the shielding portion S is detected in the B-phase plate. No state is shown.
The lower row shows a state in which, when the detection of the shielding portion S is completed in any one of the A-phase plates (falling of the signal A), the shielding portion S is detected in the B-phase plate. If either of these two conditions is satisfied, the pulse edge number P is reduced to P-1.

  When neither of the conditions 1-1 and 1-2 is satisfied, the process proceeds to the next step S3 without changing the pulse edge number P (ELSE).

  In step S3, the plate arrangement section is determined based on the signals A, B, and Z from the photoelectric sensor 4. In this step, it is examined whether the conditions 2-1 and 2-2 are satisfied.

In the expression of the condition 2-1 in FIG. 13, when the signal A is detected and the signal B is not detected while the photoelectric sensor 4 is detecting the signal Z (X == 1), that is, the signal A is When detected, "identify the signal received first as A", determine "Type = A", and return X to 0. Note that the initial value of X is 0.
Here, the signals A, B, and Z are detected, and the signals A, B, and Z are turned on in the expressions of the conditions 2-1 and 2-2, when the optical axis of the photoelectric sensor 4 is determined by the shielding portion S of each plate. It means the state of being shielded.

  In the expression of the condition 2-2 in FIG. 13, when the signal B is detected and the signal A is not detected in a state where the photoelectric sensor 4 is detecting the signal Z (X == 1), that is, the signal B is first detected. When detected, “identify the signal received first as B”, determine “Type = B”, and return X to 0.

  If neither of the conditions 2-1 and 2-2 is satisfied, the process directly proceeds to the next step S4 (ELSE).

  In step S4, the signal Z from the photoelectric sensor 4 is determined. In this step, it is examined whether the conditions 3-1 to 3-3 are satisfied.

  In the expression of the condition 3-1 in FIG. 13, when the photoelectric sensor 4 detects the signal Z (rising of the signal Z), “X = 1” is set.

  In the expression of the condition 3-2, when the photoelectric sensor 4 ends detection of the signal Z (fall of the signal Z), the position of the car is determined. The position of the car means whether the car 2 exists in the sections 1 to 6 and the sections 12 to 17 in FIG. Thereafter, the pulse edge number P is reset (P = 0), and “X = 0”.

  The expression of Condition 3-3 indicates that the car 2 does not detect the Z-phase plate and that the signal Z does not fall. When the condition 3-3 is satisfied, the pulse edge number P is reset (P = 0) and “X = 0”.

If none of the conditions 3-1 to 3-3 is satisfied, the process directly proceeds to the next step S5 (ELSE).
In step S5, the section in which the car 2 is located is output.

Next, the flowchart of FIG. 13 will be described with a specific example.
FIG. 14 is a detailed view of a portion of the plates A3, B3, and Z3 in FIG. 9, and a case where the car 2 moves up will be described.

  When the car 2 is below the plate Z3, the signals A, B, and Z are not emitted, so that the step S1 is not executed, so that P, X, and Type are in the initial state. That is, P = 0, X = 0, and Type = unknown.

When the car 2 rises and reaches a1, the signal Z rises and becomes True, but since the signals A and B remain False, both steps S2 and S3 become ELSE. In step S4, since the condition 3-1 is satisfied, X = 1.
Therefore. P = 0, X = 1, and Type are unknown.

When the car 2 rises and reaches a2, the signal B rises and becomes True, but since the signal A remains False, the step S2 becomes ELSE. Since step S3 satisfies the condition 2-2, Type = B and X = 0. Further, since the signal Z maintains True, step S4 becomes ELSE.
Therefore, P = 0, X = 0, and Type = B.

Thereafter, the signal Z remains True until the signal Z falls, that is, until the car 2 reaches a10, so that the step S4 is ELSE. Therefore, since X = 0 is also maintained, step S3 becomes ELSE.
Therefore, X = 0 and Type = B are maintained until the car 2 reaches a10.

When the car 2 rises and reaches a3, the signal A rises and becomes True, and the signal B remains True. Therefore, the step S2 satisfies the condition 1-1 and P = 1.
Therefore, P = 1, X = 0, and Type = B.

When the car 2 rises and reaches a4, the signal B falls and becomes False, and the signal A maintains True, so that the step S2 is ELSE.
Therefore, P = 1, X = 0, and Type = B remain.

When the car 2 rises and reaches a5, the signal A falls and becomes False, and the signal B maintains False, so that the step S2 satisfies the condition 1-1 and P = 2.
Therefore, P = 2, X = 0, and Type = B.

When the car 2 rises and reaches a6, the signal B rises and becomes True, and the signal A maintains False, so that the step S2 is ELSE.
Therefore, P = 2, X = 0, and Type = B.

When the car 2 rises and reaches a7, the signal A rises and becomes True, and the signal B maintains True, so that the step S2 satisfies the condition 1-1 and P = 3.
Therefore, P = 3, X = 0, and Type = B.

When the car 2 rises and reaches a8, the signal B falls and becomes False, and the signal A maintains True, so that the step S2 is ELSE.
Therefore, P = 3, X = 0, and Type = B.

When the car 2 rises and reaches a9, the signal A falls and becomes False, and the signal B maintains False, so that the step S2 satisfies the condition 1-1 and P = 4.
Therefore, P = 4, X = 0, and Type = B.

When the car 2 rises and reaches a10, the signal Z falls and becomes False, but since the signals A and B remain False, both steps S2 and S3 become ELSE. In step S4, since the condition 3-2 is satisfied, the position of the car 2 is determined. At this time,
Since P = 4 and Type = B, it can be seen from FIG. 12 that the car 2 is in the section 3 and is rising.

After that, the number of pulse edges is reset, P = 0 and X = 0, and the car position section is output as “section 3”.
As described above, the position and the driving direction of the car 2 can be detected.

In FIG. 14, when the car 2 descends, it moves from a10 to a1 in the same manner as described above, and the detailed description is omitted, but P = −4, Type = A. Therefore, it can be seen from FIG. 12 that the car 2 is in the section 14 and is descending.
Similarly, the position of the car 2 and the driving direction can be detected for the other upper plates A1, A2, B1, B2, Z1, and Z2.

  Further, the detailed description of the plate disposed below the hoistway 1 is omitted, but the position and the driving direction of the car 2 can be detected in the same manner as described above.

  For example, when the car 2 rises on the plates A4, B4, and Z4 in FIG. 9, detailed description is omitted, but P = 4, Type = A, and from FIG. You can see that it is doing.

Further, when the car 2 descends the plate A4, B4, Z4 portion of FIG. 9, detailed description is omitted, but P = −4, Type = B, and the car 2 is in the section 15 from FIG. You can see that it is descending.
Similarly, the position and operation direction of the car 2 can be detected for the other lower plates A5, A6, B5, B6, Z5, and Z6.

  Next, when the car 2 stops at the plate position (within the range of the Z-phase plate), since the Z signal of the Z-phase plate does not detect the falling, the condition 3-2 of FIG. 13 is not satisfied. It is not determined and becomes the same as the previous section. Further, the flowchart of FIG. 13 is in a state where the execution is stopped halfway. Therefore, as can be seen from FIG. 9, when the car 2 rises (sections 1 to 6), the upper end of the Z-phase plate is the section boundary, and when the car 2 descends (sections 12 to 17), Z The lower end of the phase plate is the boundary of the section.

  When the car 2 is driven in the same direction after stopping at the plate position, the flowchart of FIG. 13 is continued, and the operation is the same as that described above.

  When the car 2 stops at the plate position and then operates in the reverse direction, the rising of the A-phase and B-phase plates executed until the car 2 stops at the plate position is executed as a falling edge. Since the falling of the B-phase plate is executed as rising, the pulse edge number P becomes zero. Therefore, it is determined from FIG. 12 that the position of the car 2 is the same as the previous section, and the car 2 is corrected to the original section by passing through the next Z-phase plate.

  In the above description, the A-phase plate and the B-phase plate have three types including the gaps G of 1 to 3, or 2 to 4, but are not limited to the three locations. Further, among the A-phase and B-phase plates, the plate having the least gap portion may have no gap portion G.

  In the above description, the number of voids G is larger in the A-phase and B-phase plates below the hoistway 1 than in the A-phase and B-phase plates in the upper part of the hoistway 1. The gap G of the upper A-phase and B-phase plates may be larger than the gap G of the A-phase and B-phase plates below the hoistway 1. Furthermore, a plate can be arranged only on the lower end side or the upper end side of the hoistway 1. The height L of the gap G and the height of the shield S may not be the same as long as the edge can be detected reliably.

JP-A-2006-141537

In the above-described prior art, if an abnormality occurs in the photoelectric sensor for each of the A-phase, B-phase, and Z-phase plates, the position of the car 2 and the driving direction cannot be detected.
An object of the present invention is to detect an abnormality of a photoelectric sensor or the like and to solve the above-described problem.

The present invention includes a sensor installed in an elevator car, a plurality of plates installed in a hoistway corresponding to the sensor, and an encoder for detecting a moving distance and a moving direction of the car, wherein each of the plates in those vertical length and installation position is known, after the car has passed one of the plates of said plate, the plate next passes through, whether the are any plate, or, Means for determining whether the plate is located ahead of the moving direction when passing through any of the plates, the moving direction when passing through any of the plates, and passing through the next passing plate means for moving the direction of the time to compare whether identical or unequal, the vertical length and installation position of the one of the plates, pre-passing to the next it is determined by said determining means DOO and vertical length and installation position, the means for the comparison, and means for specifying a distance that the car has traveled a distance the car measured by the encoder has traveled, identified by means of the specific And a means for comparing the set distance and determining that an abnormality has occurred if an error between the two distances is larger than a threshold value.

The present invention also includes a sensor installed in the elevator car, a plurality of plates installed in the hoistway corresponding to the sensor, and an encoder that detects a moving distance and a moving direction of the car, in those vertical length and installation position of the plate is known, after the car has detected one of the plates of said plate, the plate to be next detected is whether the are any plates, or Means for determining whether the plate is located ahead of the moving direction when detecting any of the plates, detecting the moving direction when detecting any of the plates, and detecting the plate to be detected next means for moving the direction of upon compares whether identical or unequal, the vertical length and installation position of the one of the plate, detecting the next it is determined by said determining means The length and installation position of the vertical rate, the means for the comparison, and means for specifying a distance that the car has traveled a distance the car measured by the encoder has traveled, identified by means of the specific And a means for comparing the set distance and determining that an abnormality has occurred if an error between the two distances is larger than a threshold value.

  Further, in the present invention, the sensors are first to third photoelectric sensors, and first to third plates are installed in the hoistway so as to correspond to the respective photoelectric sensors, and the first to third photoelectric sensors are provided. The plate and the second plate are plates in which a gap through which the optical axis from the photoelectric sensor passes and a shielding part that shields the optical axis from the photoelectric sensor are alternately arranged in the vertical direction of the hoistway. The third plate is a plate having no gap, and the third photoelectric sensor detects the third plate while the third photoelectric sensor detects the third plate. The first and second photoelectric sensors are configured to detect the first plate and the second plate, and any one of the plates is the third plate. is there.

Furthermore, the present invention, the distance specified by means of the specific, after the car has passed through the one of the plate in the upward direction, when passing through the plate immediately above it to the rising direction, said one of The distance from the upper end of the plate to the upper end of the plate immediately above, or when passing the plate immediately above in the downward direction, the distance from the upper end of any of the plates to the lower end of the plate immediately above, or When passing through one of the plates in the descending direction, the distance is any one of the distance from the upper end to the lower end of any of the plates.

The present invention, the distance specified by means of the specific, after the car has passed through the one of the plate in the downward direction, when passing through the plate immediately below of that in the downward direction, wherein one of the plates distance from the lower end to the lower end of the plate immediately below the, or when passing through the plate directly below the ascending direction, the distance from the lower end of the one of the plate to the upper end of the plate immediately below the, or the one When the plate passes through the plate in the ascending direction, the distance is any one of the distance from the lower end to the upper end of any of the plates.

The invention further distance specified by means of the specific, after the car has been detected in the upward direction the one of the plates, upon detection of the plate immediately above it to the rising direction, said one of the plates The distance from the lower end of the plate to the lower end of the plate immediately above, or, when any of the plates is detected in the descending direction, the distance from the lower end to the upper end of any of the plates, or the plate immediately below it in the descending direction Is detected, the distance is any one of the distance from the lower end of any of the plates to the upper end of the plate immediately below.

Furthermore invention, the distance specified by means of the specific, after the car detects the one of the plate in the downward direction, when detecting a plate directly below of that in the downward direction, wherein one of the plates The distance from the upper end of the plate to the upper end of the plate immediately below, or, when any of the plates is detected in the ascending direction, the distance from the upper end to the lower end of any of the plates, or the plate immediately above the ascending direction upon detecting the is characterized in that the distance from the top of one of the plate to the lower end of the plate immediately above that is the distance of any.

  ADVANTAGE OF THE INVENTION According to this invention, abnormality of a photoelectric sensor etc. can be detected.

FIG. 1 is a schematic diagram showing an overall configuration according to an embodiment of the present invention. FIG. 4 is an operation explanatory diagram according to the embodiment of the present invention. FIG. 4 is an operation explanatory diagram according to the embodiment of the present invention. FIG. 4 is an operation explanatory diagram according to the embodiment of the present invention. 5 is a flowchart according to the embodiment of the present invention. FIG. 14 is an operation explanatory diagram according to another embodiment of the present invention. FIG. 14 is an operation explanatory diagram according to another embodiment of the present invention. FIG. 14 is an operation explanatory diagram according to another embodiment of the present invention. It is a figure showing arrangement of a plate in a conventional hoistway. It is a figure which shows the principal part of the conventional car ceiling part. It is a detailed explanatory view of a conventional plate. It is a table for determining the position of the conventional car. 6 is a flowchart showing a conventional operation. It is explanatory drawing of the positional relationship of each conventional plate.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing the overall configuration according to the present embodiment, and FIGS. 2 to 4 are operation explanatory diagrams.

  In the figure, reference numeral 10 denotes a main rope having one end connected to the car 2, which is wound around a hoisting machine 12 and a deflector 13 disposed in a machine room 11, and the other end is connected to a counterweight 14. 15 is a governor arranged in the machine room 11, 16 is a tension pulley arranged at the lower part of the hoistway 1, 17 is a governor rope wound around the governor 15 and the tension pulley 16, and an intermediate part is connected to the car 2. Have been.

  Reference numeral 20 denotes a control device arranged in the machine room 11, and reference numeral 21 denotes a traveling cable for transmitting and receiving signals and electric power between the car 2 and the control device 20. Reference numeral 22 denotes an encoder provided on the governor 15, which outputs an A-phase signal and a B-phase signal to the control device 20 in accordance with the rotation amount and the rotation direction, similarly to a general incremental encoder. Therefore, when the car rises and the car descends, the increase and decrease of the count are reversed. 9 and 10 indicate the same components.

  In addition, similarly to the above-described prior art, the lengths of the plates Z1 to Z6 and the lengths of the sections 1 to 17, in other words, the lengths of the plates Z1 to Z6 and the distance between the plates, and the section in which the car 2 Is known.

Next, the case where the photoelectric sensor 4z of the car 2 is at the position of the plate Z5 and the car 2 is raised will be described.
The position (Y0) of the encoder when the car 2 rises and passes through the plate Z5 (the position a2 in FIGS. 2 to 4) is obtained in advance. At this time, car 2 enters section 5. Thereafter, the operation of the car 2 is one of the following three cases.

Case 1 (Fig. 2)
When the car 2 moves up and detects the plate Z4 (a3), and further passes through the plate Z4 in the ascending direction (a4), the position of the encoder when the plate Z4 passes is acquired as (Y1).
Then, the distance S1 is calculated as S1 = | Y1-Y0 |.
Furthermore, the distance S1 is compared with the length of the section 5, and if the difference is larger than the threshold, it is determined that the distance is abnormal, and if the difference is equal to or less than the threshold, it is determined that the distance is normal.
Thereby, occurrence of an abnormality can be detected.

Case 2 (Fig. 3)
When the car 2 rises and detects the plate Z4 (a3), and then reverses and passes the plate Z4 in the descending direction (a3), the position of the encoder when the plate Z4 passes is acquired as (Y2).
Then, the distance S2 is calculated as S2 = | Y2-Y0 |.
Furthermore, the distance S2 is compared with the length obtained by subtracting the length of the plate Z4 from the length of the section 5, and if the difference is larger than the threshold value, it is determined that the distance is abnormal.
Thereby, occurrence of an abnormality can be detected.

Case 3 (Fig. 4)
When the car 2 ascends and reverses before detecting the plate Z4, detects (a2) the plate Z5 in the descending operation, and further passes (a1) the plate Z5, the position of the encoder when the plate Z5 passes. As (Y3).
Then, the distance S3 is calculated as S3 = | Y3-Y0 |.
Further, the distance S3 is compared with the length of the plate Z5. If the difference is larger than the threshold value, it is determined that the distance is abnormal, and if the difference is smaller than the threshold value, it is determined that the distance is normal.
Thereby, occurrence of an abnormality can be detected.

The above operation will be described in detail with reference to the flowchart of FIG.
When the car 2 starts ascending (Step S1) and passes through the plate Z5 (Step S2), the position (Y0) of the encoder at that time is obtained (Step S3).

Further, when the car 2 is raised (Step S4) and a plate is detected (Step S5), it is determined that the detected plate is Z4 (Step S6).
When the car 2 further moves up (Step S7) and passes through the plate Z4 (Step S8), the position of the encoder when the plate Z4 passes is acquired as (Y1) (Step S9).
Then, the distance S1 is calculated as S1 = | Y1-Y0 | (step S10).

  Furthermore, the distance S1 is compared with the length of the section 5 (step S11). If the difference is larger than the threshold value, it is determined that the distance is abnormal (steps S12 and S14). (Step S15).

Next, in step S7, when the car 2 reverses and descends and passes below the plate Z4 (step S20), the position of the encoder when the plate Z4 passes is acquired as (Y2) (step S21).
Then, the distance S2 is calculated as S2 = | Y2-Y0 | (step S22).

  Further, the distance S2 is compared with the length obtained by subtracting the length of the plate Z4 from the length of the section 5 (step S23). If the difference is larger than the threshold value, it is abnormal (steps S12 and S14). It is determined to be normal (steps S12 and S13), and the process ends (step S15).

Further, in step S4, when the car 2 is inverted and descends to detect a plate (step S30), it is determined that the detected plate is Z5 (step S31).
Further, when the car 2 descends (Step S32) and passes through the plate Z5 (Step S33), the position of the encoder when passing through the plate Z5 is acquired as (Y3) (Step S34).
Then, the distance S3 is calculated as S3 = | Y3-Y0 | (step S35).

  Further, the distance S3 is compared with the length of the plate Z5 (step S36). If the difference is larger than the threshold value, it is determined that the distance is abnormal (steps S12 and S14). (Step S15).

  Also, in step S32, if the car 2 further reverses and rises, if the car 2 passes through the plate Z5 (step S40), the result is the same as that of step S2, so the process returns to step S3; otherwise, the process returns to step S32. .

As described above, according to the present embodiment, when the car 2 passes through the plate Z5 in the ascending direction, it is possible to detect an abnormality in the device.
In the present embodiment, the case where the car 2 rises has been described. However, when the car 2 descends, the same operation can be performed by simply turning the car upside down.

Next, another embodiment of the present invention will be described. In the above embodiment, the position of the encoder when the car passed the plate was obtained and the distance was calculated, whereas in this embodiment, the position of the encoder when the car detected the plate was To calculate the distance. 6 to 8 are explanatory diagrams of the operation and correspond to FIGS. 2 to 4.
Also in the case of this embodiment, similarly to the above, the lengths of the plates Z1 to Z6 and the lengths of the sections 1 to 17, in other words, the lengths of the plates Z1 to Z6, the distance between the plates, and the car It is known in which section 2 is located.

Next, a case will be described where the photoelectric sensor 4z of the car 2 is at a position below the plate Z5 and the car 2 rises.
The position (Y10) of the encoder when the car 2 moves up and the plate Z5 is detected (the position a1 in FIGS. 6 to 8) is obtained in advance. At this time, the car 2 comes on the plate Z5. Thereafter, the operation of the car 2 is one of the following three cases.

Case 11 (FIG. 6)
When the car 2 moves up and passes (a2) through the plate Z5 and further detects (a3) the plate Z4, the position of the encoder at the time of detection of the plate Z4 is acquired as (Y11).
Then, the distance S11 is calculated as S11 = | Y11-Y10 |.
Further, the length of the plate Z4 is subtracted from the distance S11 and the length of the section 5, and the length obtained by adding the length of the plate Z5 is compared. If the difference is larger than the threshold, it is abnormal. Judge.
Thereby, occurrence of an abnormality can be detected.

Case 12 (FIG. 7)
When the car 2 ascends and passes through the plate Z5 (a2), then reverses and detects the plate Z5 in the descending operation (a2), the position of the encoder at the time of detection of the plate Z5 is acquired as (Y12).
Then, the distance S12 is calculated as S12 = | Y12-Y10 |.
Further, the distance S12 is compared with the length of the plate Z5. If the difference is larger than the threshold value, it is determined that the distance is abnormal, and if the difference is equal to or less than the threshold value, it is determined that the distance is normal.
Thereby, occurrence of an abnormality can be detected.

Case 13 (FIG. 8)
When the car 2 rises and reverses before passing through the plate Z5, passes through the plate Z5 in the descending operation (a1), and further detects the plate Z6 (a0), the position of the encoder when the plate Z6 is detected. As (Y13).
Then, the distance S13 is calculated as S13 = | Y13-Y10 |.
Further, the distance S13 is compared with the length obtained by subtracting the length of the plate Z5 from the length of the section 6, and if the difference is larger than the threshold value, it is determined that the abnormality is abnormal, and if the difference is equal to or less than the threshold value, it is determined that it is normal.
Thereby, occurrence of an abnormality can be detected.

Although a flowchart of the present embodiment is omitted, according to the present embodiment, as described above, when the car 2 detects the plate Z5 in the ascending direction, it is possible to detect an abnormality in the device.
In the present embodiment, the case where the car 2 moves up has been described. However, when the car 2 moves down, the same operation can be performed by simply turning the car upside down.

In the above-described embodiment, the A-phase, B-phase, and Z-phase plates are arranged at three locations above and below the hoistway. However, the number of plates is not limited to three. Good. Further, the plate is disposed at the upper and lower portions of the hoistway, but may be disposed at only one of the upper and lower portions of the hoistway as required.
Further, the elevator having the A-phase, B-phase, and Z-phase plates has been described, but the present invention is not limited to this. Furthermore, the invention is not limited to ETS.

Further, in FIG. 1, the elevator having the machine room 11 has been described. However, it is needless to say that an elevator having no machine room can be similarly applied. Further, the roping of the main rope 10 is not limited to the configuration shown in FIG.
Although the encoder 22 is provided on the governor, it may be provided on a tension pulley of the governor, a sheave or a motor of a hoist.

  Although a photoelectric sensor is used as the sensor, other sensors such as an infrared sensor, a magnetic sensor, an ultrasonic sensor, and image recognition may be used.

1 hoistway 2 baskets
Reference Signs List 4 photoelectric sensor 4z photoelectric sensor for Z-phase plate 5 guide rail 22 encoder Z1-Z6 Z-phase plate

Claims (7)

A sensor installed in the elevator car, a plurality of plates installed in the hoistway corresponding to the sensor, and an encoder for detecting the moving distance and moving direction of the car, the vertical direction of each plate If the length and installation position are known,
After the car has passed any of the plates, the next plate to pass is either one of the plates, or in the direction of movement when passing any of the plates. Means for determining whether the plate is located;
Means for comparing whether the moving direction when passing through any of the plates and the moving direction when passing through the next passing plate are the same or different,
The vertical length and the installation position of any one of the plates, the vertical length and the installation position of the plate that passes next determined by the determination unit, and the comparing unit, Means for determining the distance traveled;
The distance traveled by the car measured by the encoder is compared with the distance specified by the specifying means, and a means for determining that an abnormality has occurred when an error between the two distances is greater than a threshold value. Elevator equipment characterized. A sensor installed in the elevator car, a plurality of plates installed in the hoistway corresponding to the sensor, and an encoder for detecting the moving distance and moving direction of the car, the vertical direction of each plate If the length and installation position are known,
After the car detects any of the plates, the next plate to be detected is any of the plates, or in the movement direction at the time of detecting any of the plates. Means for determining whether the plate is located;
A moving direction when detecting any of the plates, and a means for comparing whether the moving direction when detecting the next plate to be detected is the same or different,
The vertical length and the installation position of any of the plates, the vertical length and the installation position of the plate to be detected next determined by the determination unit, and the comparing unit, Means for determining the distance traveled;
The distance traveled by the car measured by the encoder is compared with the distance specified by the specifying means, and a means for determining that an abnormality has occurred when an error between the two distances is greater than a threshold value. Elevator equipment characterized. The distance specified by the specifying means is:
After the car has passed any of the plates in the ascending direction,
When passing through the plate immediately above in the ascending direction, the distance from the upper end of any of the plates to the upper end of the plate immediately above,
Or, when passing the plate immediately above in the descending direction, the distance from the upper end of any of the plates to the lower end of the plate immediately above,
Or, when passing any of the plates in the downward direction, the distance from the upper end to the lower end of any of the plates,
The elevator apparatus according to claim 1, wherein the distance is any one of the following distances. The distance specified by the specifying means is:
After the car has passed any of the plates in the downward direction,
When passing through the plate immediately below in the descending direction, the distance from the lower end of any of the plates to the lower end of the plate immediately below,
Or, when passing the plate immediately below in the ascending direction, the distance from the lower end of any of the plates to the upper end of the plate immediately below,
Or, when passing any of the plates in the ascending direction, the distance from the lower end to the upper end of any of the plates,
The elevator apparatus according to claim 1, wherein the distance is any one of the following distances. The distance specified by the specifying means is:
After the car detects any of the plates in the ascending direction,
When the plate immediately above is detected in the ascending direction, the distance from the lower end of any of the plates to the lower end of the plate immediately above,
Or, when detecting any of the plates in the downward direction, the distance from the lower end to the upper end of any of the plates,
Or, when detecting the plate immediately below in the descending direction, the distance from the lower end of any of the plates to the upper end of the plate immediately below,
The elevator apparatus according to claim 2 , wherein the distance is any one of the following distances. The distance specified by the specifying means is:
After the car detects any of the plates in the descending direction,
When detecting the plate immediately below in the descending direction, the distance from the upper end of any of the plates to the upper end of the plate immediately below,
Or, when detecting any of the plates in the ascending direction, the distance from the upper end to the lower end of any of the plates,
Or, when detecting the plate immediately above in the ascending direction, the distance from the upper end of any of the plates to the lower end of the plate immediately above,
The elevator apparatus according to claim 2 , wherein the distance is any one of the following distances. The sensors are first to third photoelectric sensors,
First to third plates are provided in the hoistway so as to correspond to the respective photoelectric sensors, and the first plate and the second plate are provided in a gap portion through which an optical axis from the photoelectric sensor passes. And a shielding portion that shields an optical axis from the photoelectric sensor is a plate that is alternately arranged in the up-down direction of the hoistway, and includes a plurality of types having different numbers of gap portions, and the third portion. The plate is a plate without voids,
While the third photoelectric sensor is detecting the third plate, the first and second photoelectric sensors are configured to be capable of detecting the first plate and the second plate,
The elevator apparatus according to any one of claims 1 to 6, wherein any one of the plates is the third plate.